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Stockholders' Equity - Stock Option Activity (Detail) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
May 31, 2018 | May 31, 2017 | May 31, 2018 | May 31, 2017 | Nov. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Granted | 51,636 | 0 | 51,636 | 0 |
Service-Based Vesting Condition Options [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Outstanding at November 30, 2017 |  |  | 1,026,979 |  |
Granted |  |  | 51,636 |  |
Exercised |  |  | (2,250) |  |
Expired/forfeited |  |  | (11,000) |  |
Outstanding at May 31, 2018 | 1,065,365 |  | 1,065,365 |  | 1,026,979
Exercisable at May 31, 2018 | 1,016,358 |  | 1,016,358 |  |
Outstanding at November 30, 2017, Weighted Average Exercise Price |  |  | $ 2.50 |  |
Granted, Weighted Average Exercise Price |  |  | 7.85 |  |
Exercised, Weighted Average Exercise Price |  |  | 2.19 |  |
Expired/forfeited, Weighted Average Exercise Price |  |  | 2.10 |  |
Outstanding at May 31, 2018, Weighted Average Exercise Price | $ 2.77 |  | 2.77 |  | $ 2.50
Exercisable at May 31, 2018, Weighted Average Exercise Price | $ 2.57 |  | $ 2.57 |  |
Outstanding at May 31, 2018, Weighted Average Remaining Contractual Life (Years) |  |  | 4 years 2 months 19 days |  | 4 years 5 months 23 days
Exercisable at May 31, 2018, Weighted Average Remaining Contractual Life (Years) |  |  | 4 years 1 month 20 days |  |
Outstanding at November 30, 2017 |  |  | $ 5,706,107 |  |
Granted |  |  | 80 |  |
Exercised |  |  | 12,815 |  |
Expired/forfeited |  |  | 59,380 |  |
Outstanding at May 31, 2018 | $ 5,059,743 |  | 5,059,743 |  | $ 5,706,107
Exercisable at May 31, 2018 | $ 5,018,648 |  | $ 5,018,648 |  |

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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